unsophisticated person from the countryside

completely cornered or trapped with no way out, like a turtle caught in a jar

To catch someone or something that is already trapped or has no means of escape; a certain or effortless capture.

Chinese ground beetle (Eupolyphaga sinensis), used in TCM

the edible gelatinous fringe of a softshell turtle's carapace

(dialect) the edible gelatinous fringe of a softshell turtle's carapace

Lit. a tortoise laughing at a soft-shelled turtle for having no tail; fig. criticizing others for a fault that one also possesses; the pot calling the kettle black.

wattle-necked soft-shelled turtle (Palea steindachneri)

Yangtze giant soft-shell turtle (Rafetus swinhoei), a critically endangered species

strychnine (C21H22N2O2)